99 
creased knowledge of the biology of the forms already known to 
occur in those seas. 
1. Ophiocveas constrictum Farquhar. 
PI. IV. Figs. 4-5. 
Ophiocreas consirictus. H. Farquhar. 1900. On a new species of Oph- 
iuroidea. Trans N. Z. Inst. XXXII. p. 405. 
— constrictum H. Lyman Clark. 1905. Cat. Rec. Ophiurans, 
p. 178. 
— phanerum — — 1916. Biological Results ... 
“Endeavour”. Report on the Sea*Lilies .... p. 79. PI. XXXIII. 
1 — 2 . 
Ophiomyxa brevirima. F. Jeffr. Bell. 1917. British Antarctic (“Terra 
Nova”) Exp. 1910. Echinoderma. Zool. IV. p. 7. 
Non: Ophiocreas constrictus. F. Jeffr. Bell. 1917. British Antarctic 
(“Terra Nova”) Exp. 1910. Echinoderma. p. 7. = Ophiocreas 
longipes n. sp. 
Having had a specimen of this species from the type locality, 
Dusky Soiind, kindly sent me for examination by Professor Ben¬ 
ham, I must say that I do not see how this species could be dis- 
tinguished from the Australian form described by H. L. Clark as 
Ophiocreas phanerum. According to the descriptions it would appear 
that O. constrictum differs from O. phanerum in the character of the 
skin, which is stated to be covered with minute papillæ and small 
pores in the former, while in the latter it is perfectly smooth. I 
cannot, however, ascribe much importance to this character. In one 
of two specimens of the Australian form at band I find in places 
similar small papillæ, though not quite so distinet as in the New 
Zealand specimen. As regards the pores, I do not think them any- 
thing but artefacts, due eiiher to preservation or to some sort of 
damage done to the type specimen by the dredging. In the spec¬ 
imen at hånd I can hardly see any indication of pores, and what 
is seen is certainly due to some damage. As no other differences 
are found, I do not see any reason for distinguishing the Austral¬ 
ian from the New Zealand form. 
To the descriptions given by Farquhar and Clark 1 may 
add that the lateral plates do not meet in the ventral midline, 
but are separated by very well developed ventral plates (Fig. I. 2 ). 
This faet has a rather important bearing on the systematic position 
